下面讲讲关于如何搭建和测试MySQL高可用框架Group Replication（组复制），文字的奥妙在于贴近主题相关。所以，闲话就不谈了，我们直接看下文吧，相信看完如何搭建和测试MySQL高可用框架Group Replication（组复制）这篇文章你一定会有所受益。
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[root@wallet01 ~]# uuidgen 8d1945a5-5c74-4ba0-8240-e9d731110753 [root@wallet01 ~]# vi /etc/my.cnf ##单主模型参数 [mysqld] server-id = 1 gtid_mode = on enforce_gtid_consistency = on log_bin = mysql-bin binlog_format = row binlog_checksum = none binlog_cache_size = 16M max_binlog_cache_size = 4G max_binlog_size = 128M expire_logs_days = 7 relay_log = relay-bin master_info_repository = table relay_log_info_repository = table log_slave_updates = on plugin_load_add='group_replication.so' transaction_write_set_extraction = XXHASH64 group_replication_group_name = "8d1945a5-5c74-4ba0-8240-e9d731110753" group_replication_start_on_boot = off group_replication_member_weight = 40 group_replication_local_address = "192.168.40.34:20001" group_replication_group_seeds="192.168.40.34:20001,192.168.40.35:20001,192.168.40.36:20001" [root@wallet01 ~]# vi /etc/my.cnf ##多主模型参数 [mysqld] group_replication_enforce_update_everywhere_checks = on group_replication_single_primary_mode = off [root@wallet01 ~]# mysql -uroot -pabcd@2019 mysql> grant replication slave on *.* to 'repl'@'192.168.40.%' identified by 'repl@2019'; Query OK, 0 rows affected, 1 warning (0.02 sec) mysql> flush privileges; Query OK, 0 rows affected (0.03 sec) mysql> reset master; Query OK, 0 rows affected (0.10 sec) mysql> change master to master_user='repl',master_password='repl@2019' for channel 'group_replication_recovery'; Query OK, 0 rows affected, 2 warnings (0.25 sec) mysql> set @@global.group_replication_bootstrap_group=on; Query OK, 0 rows affected (0.00 sec) mysql> start group_replication; Query OK, 0 rows affected (2.46 sec) mysql> set @@global.group_replication_bootstrap_group=off; Query OK, 0 rows affected (0.00 sec) mysql> select * from performance_schema.replication_group_members; +---------------------------+--------------------------------------+-------------+-------------+--------------+ | CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | +---------------------------+--------------------------------------+-------------+-------------+--------------+ | group_replication_applier | a0fec232-d84a-11e9-a21c-000c2965b1d9 | wallet01 | 3306 | ONLINE | +---------------------------+--------------------------------------+-------------+-------------+--------------+ 1 row in set (0.00 sec) mysql> create user xtrabackup@'localhost' identified by 'xtrabackup@2019'; Query OK, 0 rows affected (0.07 sec) mysql> grant reload,lock tables,replication client,process on *.* to xtrabackup@'localhost'; Query OK, 0 rows affected (0.02 sec) mysql> flush privileges; Query OK, 0 rows affected (0.03 sec) [root@wallet01 ~]# su - mysql [mysql@wallet01 ~]$ ssh-keygen [mysql@wallet01 ~]$ ssh-copy-id -i ~/.ssh/id_rsa.pub mysql@wallet02 [mysql@wallet01 ~]$ ssh-copy-id -i ~/.ssh/id_rsa.pub mysql@wallet03 [mysql@wallet01 ~]$ ssh wallet02 date Mon Feb 18 10:41:16 CST 2019 [mysql@wallet01 ~]$ ssh wallet03 date Mon Feb 18 10:42:30 CST 2019 [mysql@wallet01 ~]$ xtrabackup --backup --user=xtrabackup --password=xtrabackup@2019 --stream=tar | ssh mysql@wallet02 \ "gzip >/home/mysql/backup/`date '+%Y-%m-%d_%H-%M-%S'`.tar.gz" [mysql@wallet01 ~]$ xtrabackup --backup --user=xtrabackup --password=xtrabackup@2019 --stream=tar | ssh mysql@wallet03 \ "gzip >/home/mysql/backup/`date '+%Y-%m-%d_%H-%M-%S'`.tar.gz" [root@wallet02 ~]# vi /etc/my.cnf [mysqld] server-id = 2 gtid_mode = on enforce_gtid_consistency = on log_bin = mysql-bin binlog_format = row binlog_checksum = none binlog_cache_size = 16M max_binlog_cache_size = 4G max_binlog_size = 128M expire_logs_days = 7 relay_log = relay-bin master_info_repository = table relay_log_info_repository = table log_slave_updates = on plugin_load_add='group_replication.so' transaction_write_set_extraction = XXHASH64 group_replication_group_name = "8d1945a5-5c74-4ba0-8240-e9d731110753" group_replication_start_on_boot = off group_replication_member_weight = 30 group_replication_local_address = "192.168.40.35:20001" group_replication_group_seeds="192.168.40.34:20001,192.168.40.35:20001,192.168.40.36:20001" [root@wallet02 ~]# su - mysql [mysql@wallet02 ~]$ cd backup [mysql@wallet02 backup]$ tar izxvf 2019-08-22_10-48-40.tar.gz [mysql@wallet02 backup]$ xtrabackup --prepare --target-dir=/home/mysql/backup [mysql@wallet02 backup]$ xtrabackup --copy-back --target-dir=/home/mysql/backup [mysql@wallet02 backup]$ cat xtrabackup_binlog_info mysql-bin.000001 50522845 8d1945a5-5c74-4ba0-8240-e9d731110753:1-10758 [root@wallet02 ~]# service mysqld start Logging to '/var/lib/mysql/wallet02.err'. Starting mysqld: [ OK ] [root@wallet02 ~]# mysql -uroot -pabcd@2019 mysql> set global gtid_purged='8d1945a5-5c74-4ba0-8240-e9d731110753:1-10758'; Query OK, 0 rows affected (0.02 sec) mysql> change master to master_user='repl',master_password='repl@2019' for channel 'group_replication_recovery'; Query OK, 0 rows affected, 2 warnings (0.11 sec) mysql> start group_replication; Query OK, 0 rows affected (5.91 sec) mysql> select * from performance_schema.replication_group_members; +---------------------------+--------------------------------------+-------------+-------------+--------------+ | CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | +---------------------------+--------------------------------------+-------------+-------------+--------------+ | group_replication_applier | 82a03979-df58-11e9-8a18-000c29b9ba00 | wallet02 | 3306 | ONLINE | | group_replication_applier | a0fec232-d84a-11e9-a21c-000c2965b1d9 | wallet01 | 3306 | ONLINE | +---------------------------+--------------------------------------+-------------+-------------+--------------+ 2 rows in set (0.00 sec) [root@wallet03 ~]# vi /etc/my.cnf [mysqld] server-id = 3 gtid_mode = on enforce_gtid_consistency = on log_bin = mysql-bin binlog_format = row binlog_checksum = none binlog_cache_size = 16M max_binlog_cache_size = 4G max_binlog_size = 128M expire_logs_days = 7 relay_log = relay-bin master_info_repository = table relay_log_info_repository = table log_slave_updates = on plugin_load_add='group_replication.so' transaction_write_set_extraction = XXHASH64 group_replication_group_name = "8d1945a5-5c74-4ba0-8240-e9d731110753" group_replication_start_on_boot = off group_replication_member_weight = 20 group_replication_local_address = "192.168.40.36:20001" group_replication_group_seeds="192.168.40.34:20001,192.168.40.35:20001,192.168.40.36:20001" [root@wallet03 ~]# su - mysql [mysql@wallet03 ~]$ cd backup [mysql@wallet03 backup]$ tar izxvf 2019-08-22_11-03-21.tar.gz [mysql@wallet03 backup]$ xtrabackup --prepare --target-dir=/home/mysql/backup [mysql@wallet03 backup]$ xtrabackup --copy-back --target-dir=/home/mysql/backup [mysql@wallet03 backup]$ cat xtrabackup_binlog_info mysql-bin.000001 50523169 8d1945a5-5c74-4ba0-8240-e9d731110753:1-10759 [root@wallet03 ~]# service mysqld start Logging to '/var/lib/mysql/wallet03.err'. Starting mysqld: [ OK ] [root@wallet03 ~]# mysql -uroot -pabcd@2019 mysql> set global gtid_purged='8d1945a5-5c74-4ba0-8240-e9d731110753:1-10759'; Query OK, 0 rows affected (0.04 sec) mysql> change master to master_user='repl',master_password='repl@2019' for channel 'group_replication_recovery'; Query OK, 0 rows affected, 2 warnings (0.13 sec) mysql> start group_replication; Query OK, 0 rows affected (3.39 sec) mysql> select * from performance_schema.replication_group_members; +---------------------------+--------------------------------------+-------------+-------------+--------------+ | CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | +---------------------------+--------------------------------------+-------------+-------------+--------------+ | group_replication_applier | 0b7b9f83-df62-11e9-b3ab-000c2955056e | wallet03 | 3306 | ONLINE | | group_replication_applier | 82a03979-df58-11e9-8a18-000c29b9ba00 | wallet02 | 3306 | ONLINE | | group_replication_applier | a0fec232-d84a-11e9-a21c-000c2965b1d9 | wallet01 | 3306 | ONLINE | +---------------------------+--------------------------------------+-------------+-------------+--------------+ 3 rows in set (0.00 sec)
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